Your order is on its way! This time, it's not from online shopping, even better. It's the ability to order your page selectors on Boards. 

When editing a Board, click on the page options icon, then you can drag and drop your page selectors in the order you want them. 

As new page selectors get added they will show up at the end but you can always adjust. The order of page selectors within a widget can be controlled by their order from the pivot of the saved view